I don't understand, what has GPS have to do with the car burned? He/she left the GPS on the dashboard? GPS can be subjected to extreme heat & cold but not direct sunlight. Leave a phone there and it may end up the same?
Gary, I do believe you are right... leave a mobile phone in there and the results are the same - I think I saw a post about that before and some pics as well... Anyways, never leave anything valuable in clear sight in your car - especially in Malaysia. People break in just to steal Smart Tags, what more a GPS unit or a mobile phone...